id:A115490 - OEIS Search Results

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Number of monic irreducible polynomials of degree 4 in GF(2^n)[x].

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3, 60, 1008, 16320, 261888, 4193280, 67104768, 1073725440, 17179803648, 274877644800, 4398045462528, 70368739983360, 1125899890065408, 18014398442373120, 288230375883276288, 4611686017353646080 (list; graph; listen)

	OFFSET	`1,1`
	FORMULA	`a(0)=0, a(1)=3, a(n)=20a(n-1)-64a(n-2) - T. D. Noe (noe(AT)sspectra.com), Nov 30 2006` `a(n)=4*16^n-4^n, with n>=0 - Paolo P. Lava (ppl(AT)spl.at), Jun 16 2008`
	CROSSREFS	`Adjacent sequences: A115487 A115488 A115489 this_sequence A115491 A115492 A115493` `Sequence in context: A081853 A002738 A006432 this_sequence A065889 A001084 A137150`
	KEYWORD	`nonn`
	AUTHOR	`Max Alekseyev (maxal(AT)cs.ucsd.edu)`

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Last modified October 13 20:18 EDT 2008. Contains 145016 sequences.

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